You must be at least Level 19 to open or receive this quest. See Asmodian 19 for more quests that can be started at this same level.

† All quests reward XP but NCSoft is fond of changing the amounts frequently, to the point that it is simply not wise to try to track the exact amount in a wiki.

In each zone, the Manastone Remover will offer two quests to exchange three you probably don't want Manastones (HP, Accuracy and Block for one quest, and MP, Evasion and Parry for the other) for a chance at one you do. Very rarely, you may get a stone of Superior quality. You should keep only the quest, of the two, that wants the stones you do not.